LOS ANGELES — Lee Dorman, the bassist for psychedelic rock band Iron Butterfly, has died at 70. He had been living in Laguna Niguel, Calif.

Mr. Dorman was found dead in a vehicle Friday. An investigation is underway, but foul play is not suspected. He may have been going to a doctor’s appointment when he died.

Iron Butterfly was formed and climbed to prominence in the late 1960s. Its second album, “In-A-Gadda-Da-Vida,” sold more than 30 million copies, according to the band’s website. The title track’s distinctive notes have been featured in numerous films and TV shows including “The Simpsons,” “That ‘70s Show,” and in the series finale of “Rescue Me.”